java - HikariCP 通过 Oracle 自定义类型

Question

我从 Oracle 默认数据源切换到 HikariCP。在一段代码中，我将自定义 Oracle 类型传递给存储的参数，并将 java.sql.Connection 转换为 oracle.jdbc.OracleConnection。

try(OracleConnection connection = (OracleConnection) dbConnect.getConnection()) {
        try(CallableStatement callableStatement = connection.prepareCall("{? = call pkg_applications.add_application(?,?,?)}")) {
            callableStatement.registerOutParameter(1, Types.VARCHAR);
            callableStatement.setString(2, form.getPolicyNumber());
            callableStatement.setString(3, form.getPolicyStart());

            Object[][] uploads = new Object[wrappers.size()][];

            for(int i=0; i<wrappers.size(); i++) {
                uploads[i] = new Object[4];
                uploads[i][0] = wrappers.get(i).getName();
                uploads[i][1] = wrappers.get(i).getFile().getContentType();
                uploads[i][2] = wrappers.get(i).getFile().getSize();
                uploads[i][3] = wrappers.get(i).getLocation();
            }

            callableStatement.setArray(4, connection.createARRAY("T_UPLOAD_FILE_TABLE", uploads));

            callableStatement.execute();
            int applicationId = callableStatement.getInt(1);

            operationResponse.setData(applicationId);
            operationResponse.setCode(ResultCode.OK);
        }
    }
    catch(Exception e) {
        log.error(e.getMessage(), e);
    }

我得到一个 java.lang.ClassCastException - com.zaxxer.hikari.pool.HikariProxyConnection cannot be cast to oracle.jdbc.OracleConnection。

如何使用 HikariCP 将 Oracle 自定义类型传递给存储过程？

Answer 1

您从池中获得的是代理连接。 要访问底层 Oracle 连接，您应该将 unwrap() 与 isWrapperFor() 结合使用:

try (Connection hikariCon = dbConnect.getConnection()) {
   if (hikariCon.isWrapperFor(OracleConnection.class)) {
      OracleConnection connection = hikariCon.unwrap(OracleConnection.class);
      :
      :
   }

但是，在您的示例中，OracleConnection 特定于哪个方法？你可能根本不需要转换!